staging:rtl8192u: Remove unused Zebra4 bit mask definitions - Style

Remove the unused 'Zebra4' bit mask definitions. These definitions fail
the checkpatch CamelCase naming tests. Rather then renaming, as the
definitions are unused they have simply been removed.

This is a coding style change which should not impact runtime code
execution.
Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r819xU_phyreg.h

@@ -131,12 +131,6 @@
  */
 #define bZebra1_ChannelNum        0xf80
 
-/* Zebra4 */
-#define bRTL8256RegModeCtrl1      0x100
-#define bRTL8256RegModeCtrl0      0x40
-#define bRTL8256_TxLPFBW          0x18
-#define bRTL8256_RxLPFBW          0x600
-
 /* RTL8258 */
 #define bRTL8258_TxLPFBW          0xc
 #define bRTL8258_RxLPFBW          0xc00